It a b and c hope it helps you
It would be better if I could see the text you’re reading off of
Protons, neutrons, and electrons
It is <u>true </u>that one of the principles of communication is that it is repeatable. You can communicate with other people as much as you want to, you can even talk about the same thing over and over again. This means that this type of communication can be repeated, which makes this sentence true.
